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Schedule of Investments | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
--- | --- | ---
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts |  | $ 1,362,413 |  | $ (14,454,899) |
Money Market Funds [Member] |  |  |  |  |
Market Value |  | $ 243,443,000 |  | $ 21,143,000 |
% of Partners' Capital |  | 65.52% |  | 5.10% |
Money Market Funds [Member] | Fidelity Investments Money Market Funds Government Portfolio [Member] |  |  |  |  |
Shares/Principal Amount | [1] |  |  | $ 1,103,000 |
Market Value | [1] |  |  | $ 1,103,000 |
% of Partners' Capital | [1] |  |  | 0.27% |
Open Commodity Futures Contracts, Long [Member] | United States [Member] | NYMEX Natural Gas Futures NG February 2021 contracts, expiring January 2021 [Member] |  |  |  |  |
Notional Amount | [2] |  |  | $ 429,022,819 |
Number of Contracts | [2] |  |  | 16,328 |
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts | [2] |  |  | $ (14,454,899) |
% of Partners' Capital | [2] |  |  | (3.49%) |
Open Commodity Futures Contracts, Long [Member] | United States [Member] | Nymex Natural Gas Futures Ng February 2022 Contracts Expiring January 2022 Member |  |  |  |  |
Notional Amount | [3] | $ 370,182,887 |  |  |
Number of Contracts | [3] | 9,961 |  |  |
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts | [3] | $ 1,362,413 |  |  |
% of Partners' Capital | [3] | 0.37% |  |  |
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Goldman Sachs Financial Square Government Fund Institutional Shares [Member] |  |  |  |  |
Shares/Principal Amount | [4] | $ 23,103,000 |  |  |
Market Value | [4] | $ 23,103,000 |  |  |
% of Partners' Capital | [4] | 6.22% |  |  |
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Morgan Stanley Institutional Liquidity Funds Government Portfolio Institutional Shares [Member] |  |  |  |  |
Shares/Principal Amount | [4] | $ 163,800,000 |  |  |
Market Value | [4] | $ 163,800,000 |  |  |
% of Partners' Capital | [4] | 44.08% |  |  |
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | RBC U.S. Government Money Market Fund - Institutional Share Class [Member] |  |  |  |  |
Shares/Principal Amount |  | $ 56,540,000 | [4] | $ 20,040,000 | [1]
Market Value |  | $ 56,540,000 | [4] | $ 20,040,000 | [1]
% of Partners' Capital |  | 15.22% | [4] | 4.83% | [1]
[1] | # Reflects the 7-day yield at December 31, 2020.
[2] | * Collateral amounted to $97,539,600 on open commodity futures contracts.
[3] | * Collateral amounted to $127,265,650 on open commodity futures contracts.
[4] | # Reflects the 7-day yield at December 31, 2021.

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